Entering a room: Arrange the following actions in a logical order from access to switching on the light. 1. Key 2. Door 3. Lock 4. Room 5. Switch on

Introduction / Context:
This sequencing problem captures a simple, everyday action: entering a room and turning on the light. Correct ordering relies on cause-and-effect and the physical constraints of locks and doors.

Given Data / Assumptions:

• You possess a Key.
• There is a Lock on the Door.
• You want to enter the Room and then Switch on the light.

Concept / Approach:
Access requires unlocking before opening. You cannot interact with the room interior or switch until you have entered. Therefore, unlocking precedes opening; entry precedes switching on.

Step-by-Step Solution:

Verification / Alternative check:
Consider impossibility checks: you cannot open a locked door, and you cannot switch on the light before entering if the switch is inside.

Why Other Options Are Wrong:

• 1, 2, 3, 5, 4: Opens the door before unlocking; then tries to switch before entering.
• 4, 2, 1, 5, 3: Begins inside the room; illogical.
• 5, 1, 2, 4, 3: Switching on before entry; also leaves the door locked at the end.

Common Pitfalls:
Overlooking the lock–door dependency or assuming external switches. The safest generic assumption is the switch is accessible after entry.

Final Answer:
1, 3, 2, 4, 5